Universal elbow



FIG. 1 is a perspective view thereof;

FIG. 2 is an end elevational view thereof;

FIG. 3 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is an end elevational view thereof from the opposite end of that in FIG. 2; and,

FIG. 6 is a bottom view of my design.

The opposite side elevational view is a mirror image of that in FIG. 3. 

I claim the ornamental design for a universal elbow, as shown. 